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Cornerstone · Grades 3–5 Keystones #1 18 October 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 18 October 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄8 + 1⁄5

    Answer: 19⁄20
  2. 2. Algebra Two-step equations

    Solve: 3x + 11 = 20

    Answer: x = 3
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 11cm. Give your answer to 2 decimal places

    Answer: 15.56cm
  4. 4. Ratio Sharing in a ratio

    Divide 162 in the ratio 4:1:4

    Answer: 72, 18 and 72
  5. 5. Statistics Mean

    Find the mean of: 15, 17, 17, 18, 3

    Answer: 14

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